Forms Data Controls :: Get Element Of Gridview While Editing Event?
Feb 18, 2011
i have a grid like this and i want to access the element (see arrow) on editing event of gridview, i use templatefields
Image img = GridView2.Rows[e.NewEditIndex].Cells[4].FindControl("Image3") as Image;
this code always returns null why?
i'm doing this code and it always returns null, how could i access this remember that is a templatefields.
Image img = GridView2.Rows[e.NewEditIndex].Cells[4].FindControl("Image3") as Image;
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Feb 5, 2011
I have a Gridview with edit and update feature enabled. It displays the data correctly but when I click on the Edit linkbutton(to edit the data), I get the error "Object reference not set to an instance of an object".
I tried debugging and found that the row which I click (say editindex is 1) loses its value. I could identify this while debugging the code, when the code flow moves to the rowdatabound event, the label (or for that matter any control in the rowdatabound event) shows a null value and eventually errors out.
I am unable to figure out as to why the control specified in the rowdatabound event loses its value when editing. Note: The lost valueow data is the one which I tried editing.
I am attaching the code which I have written for the rowdatabound event.
[Code]....
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Jan 3, 2010
I have a nested gridview dynamically added. It seems I resolved all issues with the loading this control on a parent page along with other controls and I can trigger the edit of the first level - the master part of the gridview. However, I cannot trigger the edit on a child gridview.
OnRowEditing="grdChildGridEdit_RowEditing"
The master and the child gridviews have objectdatasources in a markup but I have to do the additional data binding after the loading the control on the parent page (see the code below). I'm doing that additional data binding only for the master gridview that is working fine and shows the data for the master and the child gridviews. When I click the Edit button on the master gridview it shows text boxes for the editing but when I click the Edit button on the child gridview it's doing nothing and moreover the editing mode for the master gridview is going back to the initial stage (labels).
I was trying to trigger it throughuse the registering the event:
[code]....
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Sep 7, 2010
I have a gridview which has editable columns.
The gridview lives in a formview, which lives in another formview.
Inside one column is an end date. This column has a textbox which gets it's value when I choose a date from a calendar control. However, when I choose a date from the calendar control, the program crashes instead of populating the text box.
Here is the page and the selectedIndexChanged sub for the piece of work I'm trying to accomplish...
[Code]....
Gridview2 is inside formview3 inside formview1I have included the whole page below, but the problem area is gridview2[Code]....
The error I get is:
[Code]....
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Mar 16, 2011
I'm trying to edit the header row of my gridview to look like this.As you may have noticed, this is the Gmail layout and this was indeed what i intended for. I want to have on my header row some buttons that would then execute some actions to all the selected rows (very much like Gmail).
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Sep 30, 2010
I have a Gridview where the user can edit a row when he click on "Edit" (this is called update mode i thinck?).
When the editing is done, the user clicks on "Update" and the changes are written into the database. Additionally i set a "ChangeMarker" in the database that the data record has been changed by the user.
I identify the row in the database i want to update with the SelectedDataKey in the Gridview:
[Code]....
In the first line where I dim EdittedRow i got an error: "Object reference is not set to an instance object". I dont understand this error message.
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Jun 2, 2010
I have a databound gridview using datatable as datasource. Template fields are used to edit the row content.This cell value should get updated in the datatable on text_changed event without using gridView edit. Is it possible to overload the GridViewEditEventHandler for this purpose.
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Feb 7, 2011
I ahve displayed a group of data in my gridvew with the edit option linkbutton template field for each row. The gridview columns consist of employee name and projectname and total hours field employee worked.
So in this when i click the edit button using the datakeynames alue for project name id and employee id ,i have to redirect the page to another page with the values in the grid for the particular employee.so that i can update the totalhours field in the redirected page.and if i press the update button in that page then the page should be redirected to the gridview page with the updated value for the particular employee and project. The page which should be redirected consist of project name dropdownlist, module field,date field and total hours field. No employee name field.
Using the gridview rowdatabound field i have postbacked the url page with the project name id but it does not displays the project in the redirected page.And employee name i have to redirect with the session value i think?
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May 13, 2010
I also try setting editIndex to -1 in my sort function but that also doesn't work So when I am editing then sort event fire and edit item got change, so edit functionality is not working with sorting
[Code]....
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Mar 28, 2011
I have a gridview control. I am not using any templatefields or boundfields. The data will be populated dynamically. I am using RowEditing, RowUpdating and RowCancelingEdit events. In RowEditing event, as we know all the cells in that row will become editable, i need to disable few columns(Cells) from editing.
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Dec 28, 2010
i am fetching data in a dataset.now i m trying to modify the contents using :
For Each row As DataRow In ds.Tables(0).Rows
If row.Item(7) = False Then
ds.Tables(0).Rows.Item(6) = "`/abc/xx/" & row.Item(0)
End If
next
but, this gives me error saying roperty 'item' is read only.
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Dec 21, 2010
i have a gridview connected with a sqlDatatsource that show/update records and that work fine
now what if i want to edit records quickely like in excell for example
so the left/right arrows to switch between columns up/down arrows to switch between records
i want to use this grid to edit invoice like table is the gridview suitable for this kind of use or i have to use another component (DB aware ideally)?
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Dec 29, 2010
i have a gridview inside an edittemplate formview control in a master/detail scenario
so in the formview i have some comboboxs/datepicker/..etc corresponding to the master table
and a gridview corresponding to the detail table
in this gridview i enabled multi editing of rows like in this article[URL]
the problem is that even i change the values on the gridview , if i click the update button of the formview the "details table" changes isn't submited to the database
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Dec 20, 2010
i am making an application using a datagridview... And I am very new to it. And I need to edit my datas in gridview using a dropdown list.
So this is the flow of the program. As the page load, my gridview will appear, with the datas from the database binded to it, so far I have done that already. Every row in the gridview has an edit hyperlink, so when I click that, I can change the values in that row using a dropdownlist, wherein, the item in my dropdown are aswell from my database.
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Dec 3, 2010
I have a gridview which I use to edit text fields. How is it possible to start a new paragraph when entering text? I'm hoping that this can be done without using markup, as the users are not neccessarily going to be particularly computer literate.
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Apr 29, 2010
I am trying to implement a online shopping Cart which enables editing and deletion of products. I created a datatable programatically and bind it to a Griview control. (datatable is stored in a session variable ). When clicking the edit button of the Gridview nothing happened. How can I impement editing behaviour to the gridview?
Griview code -
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" BackColor="White"
BorderColor="White" BorderStyle="Ridge" BorderWidth="2px" CellPadding="3" CellSpacing="1"
DataSourceID="ObjectDataSource1" GridLines="None" DataKeyNames="id">
<RowStyle BackColor="#DEDFDE" ForeColor="Black" Font-Size="Small" />
<Columns>
<asp:CommandField ShowEditButton="True" />
<asp:BoundField DataField="serial" HeaderText="serial" SortExpression="serial"
Visible="False" />
<asp:BoundField DataField="product" HeaderText="product"
SortExpression="product" />
<asp:BoundField DataField="image" HeaderText="image" SortExpression="image" Visible="False" />
<asp:BoundField DataField="price" HeaderText="unitPrice'"
SortExpression="price" />
<asp:TemplateField HeaderText="Quantity" SortExpression="quantity">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("quantity") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="quantityLabel1" runat="server" Text='<%# Bind("quantity") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="id" HeaderText="id" InsertVisible="False" ReadOnly="True"
SortExpression="id" Visible="False" />
<asp:TemplateField HeaderText="סה"כ">
<ItemTemplate>
<asp:Label ID="lineTotal" runat="server" Text=""></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
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Oct 16, 2010
In vs2008 and sql2005, I want to edit gridview..
In edit template I want a dropdownlist that must show that row's cell's value as the first value and remaing values should come down in the dropdown.
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Jan 6, 2011
I'm using a simple search with a gridview. What is happening is when I click to edit the record, it presents me with the record fine but when I click Update in my FormView, the Gridview doesn't update. I have a feeling I'm missing something simple but I can't get totally sure so here is my code hoping someone can point the way.
[Code]....
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Sep 10, 2010
Is there a code example out there that shows inline editing using the Gridview and using Ajax?
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Nov 12, 2010
I have a gridview with a edit button for each row. Selecting an edit button changes the row to Edit mode. When in Edit mode, the row ID's are not being captured correctly. Any row I select defaults to one of the first 2 rows I had selected earlier.If I first select Row 1, it puts that in edit mode. When I "Cancel" out of it, row 2 goes into Edit mode. Now, when I select row 3, row 1 goes into edit mode again. From this point, any row I select puts either row 1 or 2 into select mode.
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Dec 9, 2010
I have editing enabled gridview. I m basically calculating many columns in rowdatabound event of gridview. For this i m using templatefields with labels control inside them.
Here is my c# code-
[Code]....
It doesnot cause any problem. But when i tried editing and click on edit button of my grid. It throws error in rowdatabound event's second line starting with decimal rejp.
Message- Object reference not set to an instance of an object.
Am i missing something or should i have to use any other event to handel editing in this case.
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Apr 7, 2010
I have loaded up a gridview object with data. I have turned on Edit on the grid. It lets me edit the data, but I also want to put some code to check for correct data in each field. I tried to assign a requiredfieldvalitor, comparevaliditor but they don't work. Is there an event I can capture to fire up some code before the grid sves my data?
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Feb 14, 2010
I am using SQLDataSource which I am using for my GridView "UGrid".
When I click edit, I want numerical data to be aligned on the Right. I have the following code but its not working.
[Code]....
[Code]....
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Sep 7, 2010
Example for Editable Grid with dropdownlist inside? Getting some problem in updating the data
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Dec 18, 2010
Using a gridview with paging, sorting, inline editing, and selection enabled. I noticed the following:1. after selecting a row, then sorting, the selection sticks to the position in the grid, rather than the actual data. I would have expected it to either stick with the data, or clear the selection so nothing is selected. I would just assume clear the selection rather than have it actually change, like it is now. When a row is selected, I'm showing detail information about that specific row below the grid, so when a user does this, then sorts, the selected row changes and the new selected row's detail info shows below the grid. How should I go about stopping this? Hook into the gridview's Sorting event and set the selected row back to -1 (for nothing selected)? I assume that would work but I was compelled to post anyway to see if there is something else I should be doing...
2. I have not tested yet, but I assume the same thing would happen when paging occurs?3. another issue I'm having is when a user enters into edit mode for a row. This also does not clear a previous selection, so if a user had first selected a row, which shows the detail info for that row below the grid, then they hit the edit button for a different row, now on screen at the same time is a selected row (visible by selectedRowStyle), it's detail info below, and a completely different row in edit mode... this is a very confusing scenario for a user. I either need to ensure that any selection is cleared once in edit mode, OR sync these up so that the row in 'edit' mode also becomes the selected row... what do you guys/gals normally do for this situation? I'm thinking syncing up so that the row in edit mode is also selected sounds preferable... how would I do that?
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